Year	Number
1960	2140
1961	4289
1962	4512
1963	4239
1964	4784
1965	8524
1966	1625
1967	5059
1968	1621
1969	374
1970	-13059
1971	-49671
1972	-48467
1973	-52115
1974	-62991
1975	-71454
1976	-91037
1977	-57530
1978	-60759
1979	-56314
1980	-39943
1981	-52794
1982	-43402
1983	-23911
1984	-33268
1985	-35416
1986	-53217
1987	-48647
1988	-31904
1989	-24955
1990	-11341
1991	-60109
1992	-43097
1993	-61086
1994	-40371
1995	-75544
1996	-79310
1997	-80488
1998	-70048
1999	-13257
2000	5407
2001	55052
2002	10426
2003	24180
2004	31530
2005	5496
2006	15763
2007	-11496
2008	29607
2009	7098
2010	-21076
2011	-44800
2012	-42929
2013	-57630
2014	-72415
2015	-95981
2016	-29727
2017	-68704
2018	-115434
2019	-61946
2020	-17106
2021	-52549
2022	-10000
2023	-10000